I've been asked to make a birthday cake in a couple of weeks, serving 20-25. This, in my mind means at least 25-30, right? Pretty much I can make whatever I want, *but* I will be traveling eight hours on the day before the party. I made a lemon layer cake a couple of months ago that I could adapt for this, so what to bake isn't the issue -- the question is how much. I do have a large square cake pan (14 or 16 inches, need to check) or I could just do two 9x13s, which might be easier to transport and store.